Contraceptive Hormone Induced Changes - CHIC INNOVATION IN HIV PREVENTION RESEARCH WORKSHOP Cresta Lodge, Harare 21-22 Aug 2019 Allen Matubu

Background Approx. 210 million hormonal contraceptive users globally, 35 million on injectable DMPA DMPA use is common in Sub Saharan Africa, a region host to >70% of global HIV burden Approx. 15% of the 2.2 million Zimbabwean women on modern contraceptives use DMPA Epidemiologic & Laboratory studies: possible association between DMPA use and increased HIV acquisition risk but findings have not been consistent We therefore sought to investigate the biological plausibility of the observed increased HIV acquisition risk by measuring the number of HIV target cells in female genital tract and T-cell responsivity to stimulation

Untangling the mixed data on HC-HIV Two parallel approaches : Investigation of biological and immunological changes that occur with contraceptive use and that may impact HIV risk (CHIC Studies, Haddad, Dezzutti, etc) Randomized controlled trial (ECHO trial) Women randomized to DMPA, LNG implant, or copper IUD Objective: To assess the impact of contraceptive methods on the numbers and activation status of immune cells in the genital tract and frequency of cytokine producing T-Cells in peripheral blood following polyclonal stimulation ex vivo Hypotheses Women initiating DMPA will have increased cervical HIV target cells compared to baseline after 3 months of use. DMPA use decreases T cell activation to polyclonal stimulation as measured by Cytotoxic T-Lymphocyte Associated Protein–4 expression

Study Methods 234 Healthy Women Ages 18-34 in Harare. (Median age- 27.7yrs) HIV negative Free of STIs (GC, CT, Trichomonas, active HSV) No recent exogenous hormone use No hormonal or intrauterine contraceptives for >30 days No DMPA for >10 months All in follicular phase of menstrual cycle (day 1-14) and not bleeding Confirmed objectively by UPLC-MS/MS at each visit Contraception (started immediately after baseline sampling*) Injectables: DMPA-43, Net-EN-41, MPA/E2-36 Implants: LNG - 36 and ENG - 37 IUD: copper - 41) Immune cell populations from PBMCs and cervical cytobrushes were quantified by flow cytometry

Laboratory cell preparation

Intracellular staining and Flowcytometry CD4+, CD8+, CD69+. CCR5, TNF-α, IFN-Ƴ, IL-4 IL-13

Results

Net-EN Use Associated with Local and Systemic Increases in HIV-Target Cells

Copper IUD Use Associated with Local Increases in HIV-Target Cells

DMPA reduced T-Cell responsivity to polyclonal stimulation at steady state levels as measured by CTLA-4 expression

DMPA depletes proportion of CD8+IFN-Ƴ+ cells following polyclonal stimulation

What is a reasonable level of risk No increased risk of HIV acquisition Increased risk of HIV acquisition

Conclusions Net-En and not DMPA is associated with increased CCR5 and CD69 on CD4+ cells in peripheral blood and female genital tract. CU-IUD is associated with increased CCR5 and CD69 on CD4+ cells in female genital tract DMPA, at high serum concentrations is associated with decreased T-cell responsivity to polyclonal stimulation DMPA is associated with decreased frequency of CD8+IFN-Ƴ+ cells in PBMCs following polyclonal stimulation

Thank you

Acknowledgements . ZimCHIC Participants IRBs-JREC, MRCZ, MCAZ, RCZ Sharon Achilles & Sharon Hillier Prof ZM Chirenje, Prof M Mbizvo, Dr Maramba & Dr F Mhlanga UZCHS Obs & Gyn Department Chair ZimCHIC study Team UZCHS-CTRC Clinic and Lab Teams